1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
// Copyright 2020 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package harness
import (
"context"
"fmt"
"net"
"strings"
"testing"
"github.com/docker/docker/api/types/mount"
"gvisor.dev/gvisor/pkg/test/dockerutil"
"gvisor.dev/gvisor/pkg/test/testutil"
)
//TODO(gvisor.dev/issue/3535): move to own package or move methods to harness struct.
// WaitUntilServing grabs a container from `machine` and waits for a server at
// IP:port.
func WaitUntilServing(ctx context.Context, machine Machine, server net.IP, port int) error {
var logger testutil.DefaultLogger = "util"
netcat := machine.GetNativeContainer(ctx, logger)
defer netcat.CleanUp(ctx)
cmd := fmt.Sprintf("while ! wget -q --spider http://%s:%d; do true; done", server, port)
_, err := netcat.Run(ctx, dockerutil.RunOpts{
Image: "benchmarks/util",
}, "sh", "-c", cmd)
return err
}
// DropCaches drops caches on the provided machine. Requires root.
func DropCaches(machine Machine) error {
if out, err := machine.RunCommand("/bin/sh", "-c", "sync && sysctl vm.drop_caches=3"); err != nil {
return fmt.Errorf("failed to drop caches: %v logs: %s", err, out)
}
return nil
}
// DebugLog prints debug messages if the debug flag is set.
func DebugLog(b *testing.B, msg string, args ...interface{}) {
b.Helper()
if *debug {
b.Logf(msg, args...)
}
}
const (
// BindFS indicates a bind mount should be created.
BindFS = "bindfs"
// TmpFS indicates a tmpfs mount should be created.
TmpFS = "tmpfs"
// RootFS indicates no mount should be created and the root mount should be used.
RootFS = "rootfs"
)
// MakeMount makes a mount and cleanup based on the requested type. Bind
// and volume mounts are backed by a temp directory made with mktemp.
// tmpfs mounts require no such backing and are just made.
// rootfs mounts do not make a mount, but instead return a target direectory at root.
// It is up to the caller to call the returned cleanup.
func MakeMount(machine Machine, fsType string) ([]mount.Mount, string, func(), error) {
mounts := make([]mount.Mount, 0, 1)
switch fsType {
case BindFS:
dir, err := machine.RunCommand("mktemp", "-d")
if err != nil {
return mounts, "", func() {}, fmt.Errorf("failed to create tempdir: %v", err)
}
dir = strings.TrimSuffix(dir, "\n")
out, err := machine.RunCommand("chmod", "777", dir)
if err != nil {
machine.RunCommand("rm", "-rf", dir)
return mounts, "", func() {}, fmt.Errorf("failed modify directory: %v %s", err, out)
}
target := "/data"
mounts = append(mounts, mount.Mount{
Target: target,
Source: dir,
Type: mount.TypeBind,
})
return mounts, target, func() { machine.RunCommand("rm", "-rf", dir) }, nil
case RootFS:
return mounts, "/", func() {}, nil
case TmpFS:
target := "/data"
mounts = append(mounts, mount.Mount{
Target: target,
Type: mount.TypeTmpfs,
})
return mounts, target, func() {}, nil
default:
return mounts, "", func() {}, fmt.Errorf("illegal mount type not supported: %v", fsType)
}
}
|
